поискавой системы для электроныых деталей |
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BU90054GWZ датащи(PDF) 9 Page - Rohm |
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BU90054GWZ датащи(HTML) 9 Page - Rohm |
9 / 18 page 9/15 BU90054GWZ TSZ02201-0F1F0AG00060-1-2 © 2014 ROHM Co., Ltd. All rights reserved. 8.Dec.2014 Rev.002 www.rohm.com TSZ22111・15・001 ● PC Board layout The suggested PCB layout for the BU90054GWZ are shown in Figure. The following guidelines should be used to ensure a proper layout. 1) The input capacitor CIN should be connect as closely possible to VIN pin and GND pin. 2) From the output voltage to the FB pin line should be as separate as possible. 3) COUT and L should be connected as closely as possible. The connection of L to the LX pin should be as short as possible. Figure 19. PCB layout ● External parts selection Inductor selection The inductance significantly depends on output ripple current. As shown by following equation, the ripple current decreases as the inductor and/or switching frequency increase. f: switching frequency L: inductance ⊿ IL: inductor current ripple As a minimum requirement, the DC current rating of the inductor should be equal to the maximum load current plus half of the inductor current ripple as shown by the following equation. CIN L COUT LX VIN GND EN VOUT FB (VIN-VOUT)×VOUT ⊿ IL= L×VIN×f ⊿ IL ILPEAK= 2 IOUTMAX + |
Аналогичный номер детали - BU90054GWZ |
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Аналогичное описание - BU90054GWZ |
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